Etymologies

German Nudel.

Probably alteration of noddle.

Imitative.

(American Heritage® Dictionary of the English Language, Fourth Edition)

The sense "string of pasta" is from the German word Nudel; cognate to the Dutch noedel, Swedish nudel (the Flemish word noedel is also from German); of uncertain origin. The senses "fool" and "brain, head" are probably unrelated. (Wiktionary)

Examples

We started off having lunch with Amanda's editor, the charming and talented Dongwon Song, at what he described as a noodle joint for homesick expat Japanese, which had thoroughly amazing restrooms.

On the surface The Eye of Jade is a classic detective fiction with lots of underworld contacts and hushed conversations in noodle bars, but underneath, Liang, who fled China after her involvement in the student protests in Tiananmen Square, is doing something much more than an examination of China old and new.

Although Iran has not been a heavy consumer of noodles, it has an ancient history of noodle-making; indeed, there has been speculation that the Chinese learned the idea of noodle-making from the same Persian merchants who introduced the flour mill to them during the Han dynasty 206 BC-AD 220.